I have used many many rolls of the roll offs with Scott goggles in recent years, the vision they enable is FABULOUS. I race desert and I find I need them even in the dusty races I enter. I can get two rolls to last an entire dusty race, because I get a spare set of goggles when I pit. But, recently I raced where it rained my entire event, and I had a roll run out about half the way around a 30 mile loop. I need to see Scott produce a roll with more material on it. Then they would get 5 stars!!